Rock-crushing machine

ABSTRACT

A rock-crushing machine having a rectangular frame open at its top and bottom. A wedge-shaped jaw crusher is mounted at its lower wide end on a drive shaft having end shaft extensions eccentric to the axis of the shaft and supported by the sides of the frame, the shaft extensions extending outwardly of the frame and each carrying a pulley. The jaw crusher is vertically centrally positioned in the frame and is mounted on an upper shaft for swinging movement about the axis thereof. The ends of the shaft extend through slots in the same sides of the frame and are mounted in bearing blocks, each supported by a spring above and below the same to provide a resiliently mounted floating support for the upper shaft. The jaw crusher occilates within the frame under the action of the eccentrically driven drive shaft. Opposite each inclined side of the jaw crusher is a vertical stationary jaw element each slidably supported by the frame sides and mounted on the rear of each jaw element is a horizontally movable inner wedge also slidably supported by the frame sides. A coacting vertically movable outer wedge having a vertical side is in sliding engagement with an end sidewall of the frame. Upper and lower tie bolts extend through the vertical jaw elements and through the wedges and outwardly of the end sidewalls, each tie bolt carrying a compression coil spring engaging the end sidewall and a nut-held washer on the tie bolt. The outer wedges are each provided with elongated vertical slots through which the tie bolts extend. A ram at the top of each outer wedge is operative to effect a downward vertical movement thereof to move the stationary jaw element towards the side of the jaw crusher opposite thereto so as to narrow the gap therebetween. This adjustment of the size of the gap will control the size of the particles of the rock being crushed and discharged from the bottom of the frame.

United States Patent Ferris Feb.1,l972

[54] ROCK-CRUSHING MACHINE Ford Ferris, Staten Island, NY.

[73] Assignees: David Bourne, Brooklyn, N.Y.; Gail C. Moore, Wyalusing, Pa. part interest to each 221 Filed: Dec. 16,1969

21 Appi.No.: 885,564

[72] Inventor:

Primary E.taminerGranville Y. Custer, Jr. Attorney-Carl Miller l 5 7 1 ABSTRACT A rock-crushing machine having a rectangular frame open at its top and bottom. A \vedge-shapedjaw crusher is mounted at its lower wide end on a drive shaft having end shaft extensions eccentric to the axis of the shaft and supported by the sides of the frame, the shaft extensions extending outwardly of the frame and each carrying a pulley. Thejaw crusher is vertically centrally positioned in the frame and is mounted on an upper shaft for swinging movement about the axis thereof. The ends of the shaft extend through slots in the same sides of the frame and are mounted in bearing blocks, each supported by a spring above and below the same to provide a resiliently mounted floating support for the upper shaft. The jaw crusher occilates within the frame under the action of the eccentrically driven drive shaft. Opposite each inclined side of the jaw crusher is a vertical stationary jaw element each slidably supported by the frame sides and mounted on the roar of each jaw element is a horizontally movable inner wedge also slidably supported by the frame sides. A coacting vertically movable outer wedge having a vertical side is in sliding engagement with an end sidewall of the frame. Upper and lower tie bolts extend through the vertical jaw elements and through the wedges and outwardly of the end sidewalls, each tie bolt carrying a compression coil spring engaging the end sidewall and a nut-held washer on the tie bolt, The outer wedges are each provided with elongated vertical slots through which the tie bolts extend. A ram at the top of each outer wedge is operative to effect a downward vertical movement thereof to move the stationary jaw element towards the side of the jaw crusher opposite thereto so as to narrow the gap therebetween. This adjustment of the size of the gap will control the size of the particles of the rock being crushed and discharged from the bottom of the frame.

4 Claims, 7 Drawing Figures PATENTED FEB 11972 3,638,870

SHEEF 2 OF 3 IN VliN 7 0R Foam ERRIS ATTORNEY Pmminm um 3,638Q870 SHEU 30F 3 ATTORNEY R. 0 7 m V m 4 FORD FERRIS ROCK-CRUSHING MACHINE This invention relates to crushers or disintegrators in which material is reduced in particular size and is designed to crush rocks, stone, coal, ores and the like.

The primary object of this invention is to provide within a boxlike casing an oscillating wedge-shaped jaw crusher element pivotally mounted on bearing blocks adjacent the narrow end of the jaw crusher element located at the top opening of the casing, the wide bottom end of the jaw crusher element being disposed adjacent the open bottom of the casing.

Another object of this invention is to mount the jaw crusher element on a bottom shaft disposed adjacent the wide bottom end thereof, the shaft being eccentrically mounted on stub shafts extending through the opposite sidewalls of the casing and each stub shaft carrying a drive pulley.

A further object of this invention relates to a top shaft mounting for the upper end of the jaw crusher element, vertically movable in slots provided in the sidewalls of the casing, and extending outwardly therefrom and supported in the bearing blocks, the jaw crusher element being swingable about the axis of the top shaft.

Yet another object of this invention is to resiliently support each bearing block by a compression spring above and below each bearing block with the springs mounted on brackets exteriorly of the sidewalls of the casing.

Still another object of this invention is to provide within the casing in opposed relation to each of the transverse sides of the jaw crusher element a fixed jaw member vertically positioned within the casing there being a wide material receiving gap at the open top of the casing between the jaw crusher element and the fixed jaw member and a narrow gap between the same at the bottom open end of the casing through which the crushed and/or broken up and reduced in size material is discharged.

A further object of this invention is to provide between each fixed jaw member and an end sidewall of the casing a pair of inner and outer coacting wedges, the inner wedge being supported both by the fixed jaw member which is slidably supported by the sides of the casing and a support lug on the inside of the casing sidewalls on which the inner wedge is slidably seated, and the coacting outer wedge arranged to be vertically movable so as to adjust the position of the fixed jaw member for selectively varying the width of the lower discharge gap.

Another object of this invention is to provide a power operated means at the upper end of each coacting outer wedge supported between the top thereof and a yoke structure mounted on the casing and operative to vertically move the outer wedge to effect adjustment ofthe fixedjaw member.

Still another object of this invention is to connect each fixed jaw member and it associated inner wedge, the outer wedge and the adjacent end sidewall of the casing by a pair of vertically spaced spring controlled tie rods, the springs for the tie rods being disposed exteriorly of the casing end sidewalls, and the tie rods extending through vertical elongated slots in the coacting outer wedge.

Still another object of this invention is to oscillate the jaw crusher element upon rotation of the eccentrically driven stub shafts about the axis of the floatingly mounted top shaft between the fixed jaw elements such as to crush and break up between the opposed surfaces thereof large size stone, rock, etc., delivered into the top open end of the casing, into smaller size pieces such as to be downwardly discharged through the narrow gaps at the bottom of the casing.

Further objects of the invention will appear as the description proceeds.

To the accomplishment of the above and related objects, my invention may be embodied in the form illustrated in the accompanying drawings, attention being called to the fact, however, that the drawings are illustrative only and that changes may be made in the specific construction illustrated and described within the scope ofthe appended claims.

FIG. 1 is a top plan view of the rock-crushing machine.

FIG. 2 is a detail view showing a modified fonn ofjoining the sidewalls of the casing of the rock-crushing machine.

FIG. 3 is a vertical view partly in cross section taken on line 3-3, FIG. 1, ofthe rock crusher machine.

FIG. 4 is a detail sectional view taken on line 4-4, FIG. 3.

FIG. Sis a detail sectional view taken on line 5-5, FIG. 3.

FIG. 6 is a vertical transverse sectional view taken on line 66, FIG. 3.

FIG. 7 is a perspective view of the oscillating jaw crusher with its top and bottom shaft mountings.

Referring to the drawings in greater detail a rectangular boxlike casing 10 is formed of longitudinal sidewalls ll, 12 and end sidewalls l3, 14, the sidewalls being rigidly joined together as by forming the casing as a single casting or by welding the adjoining edges of the sidewalls together (not shown). If desired the longitudinal sidewalls and the end sidewalls may be bolted together, FIG. 2, showing one corner of the casing 10, wherein longitudinal sidewall 11 if formed with a lateral flange 16 and end sidewall 14 is widened to extend over flange 16. A row of vertical bolt receiving openings 17 extending through the flange 16 and end sidewall extension 18 each receive a bolt 19 provided with a nut 20. It is thus seen that with each corner of the casing 10 thus formed that the sidewalls thereof are rigidly secured together. The casing 10 is both open at its top and bottom and the sidewalls are of a thickness to possess the requisite strength to withstand the pressures and stresses arising in the rock-crushing process to be hereinafter described. Each end end sidewall 13, 14 is provided at its lower edge and at the corners thereof with a horizontal extending footplate 22 provided with a fastening receiving opening 23, the footplates being adapted to seat on a suitable support (not shown) to be secured thereto by bolts (not shown) extending through openings 23.

Centrally located within casing 10 is a jaw crusher 24 of wedge-shaped formation having its wide bottom 25 substantially in the plane of the bottom edge of the casing 10 and its narrow upper end rounded as at 26 and extending slightly above the top edge of casing 10, see FIG. 3. The width of the jaw crusher 24 is such as to provide a slight clearance 28 between the end sides thereof and the inside surfaces of the longitudinal sidewalls ll, 12, see FIG. 6.

The jaw crusher 24 is pivotally supported adjacent its lower wide bottom through the medium of antifriction bearings (ball or roller type) 30, 31 on a main shaft 34, the antifriction bearings 30, 31 being mounted in the end sides of the jaw crusher 24 and the main shaft 34 extending through a bore 35 that is of a diameter slightly greater than the diameter of the main shaft 34. Integral with the main shaft 34 and extending from each end thereof are stub shafts 37, 38 similarly eccentrically positioned with respect to the axis of the main shaft 34. Each of the longitudinal sidewalls ll, 12 is formed with a boss 39, 40 for respectively receiving the antifriction bearings (ball or roller type) 42, 43 which respectively rotatably support the stub shafts 37, 38, in the manner well known. The stub shafts 37, 38 extend outwardly of the longitudinal sidewalls 11, 12 and fixedly mounted on the stub shafts 37,38 are drive pulleys 45, 46. As will be noted in FIGS. 3 and 7, the axis 48 of both of the stub shafts 37, 38 which are coaxial are laterally horizontally spaced (to the left viewing FIG. 3) from the axis 49 of the main shaft 34, for a purpose to be hereinafter described.

The upper narrow end of the jaw crusher 24 is supported on an upper shaft 52, the end portions of which extend through vertical guide slots 53, 54 provided respectively in the longitudinal sidewalls 11, 12 best shown in FIG. 6. Carried by each extended end of the upper shaft 52 is a bearing or support block 56, 57 each provided on its top and bottom with a projecting central boss 59, 60 which are coaxial. Arranged above and below each bearing block 56, 57 in vertical spaced relation thereto are respectively a pair of brackets 62, 63 having flat seating faces 64, 65 in opposed relation to the top and bottom of the bearing blocks which are also flat. Each of the seating faces 64, 65 is provided with a projecting boss 67, 68 respectively, coaxial with the bosses 59, 60. Like compression coil springs 69, 70 are disposed respectively between the top of the bearing blocks 56, 57 and the bracket seating faces 64 and between the bottom of the bearing blocks and the seating faces 65 in surrounding relation to the projecting bosses 59. 67 and 60, 68, such that the bearing blocks 56, 57 are resiliently supported so as to provide a floating vertical movement of the top shaft 52 in its guide slots 53, 54 as clearly shown in FIG. 6. The brackets 62, 63 are disposed exteriorly of the longitudinal sidewalls 11, 12 and are rigidly secured thereto in any desired manner (not shown). Upper brackets 62 are mounted on a central upstanding extension 71 of the longitudinal sidewalls 11, 12 see FIG. 3. The top shaft 52 may have its ends rotatably supported by antifriction bearings (not shown) in the bearing blocks 56, 57 for rotative and/or swinging movement therein with the body portion of the top shaft fixedly secured to the jaw crusher 24 or the ends of the top shaft may be fixedly secured in the bearing blocks 56, 57 and the jaw crusher 24 having rotative and/or swinging movement on the top shaft 52 extending therethrough. In the latter event antifriction bearings similar to 30, 31 may be provided between the top shaft 52 and the jaw crusher 24.

Opposite each side face of the jaw crusher 24 is a normally fixed or stationary jaw member 74, 75. The jaw members 74, 75 and their associated coacting parts to be hereinafter described are identical and the following detailed description of the jaw number 74 and its associated parts will equally apply to the other jaw member 75 and its associated parts, like reference numerals designating similar pans ofthe two units.

Jaw number 74 is a vertical plate of substantial thickness presenting a vertical flat surface 77 in opposed relation to the adjacent inclined face 24a of the jaw crusher 24. A like flat vertical surface 77 on jaw number 71 is opposite the adjacent inclined face 24b of the jaw crusher. The upper end portion of jaw number 74 extends above the upper edge of sidewalls 11, 12 and is formed at each side thereof with a lateral extension 78. Provided in the lateral extension 78 is an upwardly directed slot 80 dimensioned to slidably receive therein the upper edge portion of an associated longitudinal sidewall 11, see FIG. 4. The upper edge 81 of each of the longitudinal sidewalls 11, 12 is flat and provides a track on which the base of slot 80 slides when the position of the jaw member 74 is changed as will be hereinafter described. The bottom edge of the jaw member 74 is preferably flush with the bottom edge of the longitudinal sidewalls 11, 12.

Disposed between jaw member 74 and end sidewall 14 of the casing is a pair of Coacting wedges 83, 84. Both wedges 83, 84 are the same height as the vertical height of the longitudinal sidewalls 11, 12 with their top and bottom ends coplanar with the top and bottom edges ofsaid sidewalls, in the normal position of the wedges prior to any adjustment of the position ofjaw member 74. Wedge 83 has a flat vertical surface 86 that abuts the inside vertical surface 87 of the jaw number and is provided with a recess 88 to receive therein a complemental key projection 89 of the jaw member 74 such as to rigidly lock the wedge 83 to the jaw member 74 against relative vertical movement therebetween. Vertically spaced horizontal bores 90 in wedge 83 each have extending therethrough a tie bolt 92, the head 93 of each tie bolt being seated in a complemental recess 94 provided in the outer face of the jaw member 74, and the tie bolts 92 extending through the jaw member 74 each into its associated bore 90 in wedge 83. The other face 96 of wedge 83 is inclined downwardly. At each side of the bottom end portion of wedge 83 is rectangular recess 98 provided with an upper horizontal bearing surface 99. Formed integral or otherwise secured to each of the longitudinal sidewalls interiorly thereof and adjacent to their bottom edge is a bearing lug 100 having a flat upper horizontal bearing support surface 101, see FIGS. 3 and 5. As seen in FIGS. 3 and 5, the recess 98 is of greater length than bearing lug 100 and that the bearing surface 99 of the recess is in sliding seating engagement with the top bearing support surface 101 of the bearing lug 100.

Coacting wedge 84 is vertically movable and has an inclined side surface 104 is slidable abutting engagement with the inclined surface 96 of wedge 83. The other side 105 of wedge 84 is vertical and flat and abuts the flat inside surface of end sidewall 14. Wedge 84 is provided with a pair of vertically spaced elongated openings 108 through which tie rods 92 extend, the tie rods 92 further extending through openings provided therefor in the end sidewall 14 to extend a substantial distance therebeyond, the ends of the tie bolts 92 being threaded to receive nuts 109. Surrounding the outwardly pro jecting end of each tie rod 92 is a compression coil spring 110, there being a washer element 111, between the outer end of the coil spring and nut 109 on which the end of the spring seats. By setting up on the units 111, springs 110 are sufficiently compressed to apply a predetermined pull on the fixed jaw 74 such as to maintain the abutting faces of the jaw 74, coacting wedges 83, 84 and end wall 14 is pressure contact. The width of wedge 84 corresponds to the width of wedge 83, with its ends abutting the inside surfaces of the longitudinal sidewalls 11, 12.

Straddling the upper flat end 114 is an inverted U-shaped yoke 116, see FIGS. 3 and 6, having depending side legs 117, 118 and a bright portion or crossbeam 120. The crossbeam 120 is reinforced by an upstanding integral triangular-shaped rib 121. Legs 117, 118 of yoke 116 seat against the outside surface of the longitudinal sidewalls 11 and 12 and are detachably secured thereto by bolts or screws 122, see FIG. 3. Crossbeam 120 is vertically spaced from the top end 114 of wedge 84 and centrally interposed therebetween is a screwjack or hydraulic ram 125, the use of one or the other being optional. Shown in the drawings is a screwjack. The internally threaded sleeve 126 of the screwjack is provided with an axial depending cylindrical boss 127 seated in cylindrical recess 128 provided in top 114 of wedge 84, see FIG. 3, with the bottom of the sleeve 126 also being seated on the surface of wedge top 114. Openings 129 in the wall of sleeve 126 receive a removable bar 130 for rotating the sleeve. The threaded rod 132 fitted into sleeve is nonrotatable and is provided with a flanged head 133 suitably secured to the underside of crossbeam 120. It is thus seen that turning the sleeve 126 in a direction to move the threaded rod 132 outwardly thereof will move the sleeve 126 downwardly to force the wedge 84 downwardly, the elongated slots 108 accommodating this movement with relation to the fixed tie rods 92. Downward movement of wedge 84 will force wedge 83 horizontally, slidably supported on bearing lugs 100 and carrying jaw member 74 slidably supported at its top on track edge 81 of the sidewalls 11, 12 towards the inclined face 24a ofjaw crusher 24 to adjust the width of bottom gap 135 at the lower ends of the jaw crusher 24 and jaw member 74. The size of the bottom gap 135 along with the adjustment of the jaw member determines the size of the crushed rock that can be discharged through the gap. As the gap 135 is relatively narrow, the ex tent of adjustable movement of the jaw member is necessarily small and will not materially affect the size of the entrance or rock-receiving upper gap 136 into which the large rock is discharged to be crushed and broken up by the machine. In its adjusted position the jaw member 74 is fixed as pressure thereagainst in the rock-crushing process cannot move wedge 84 upwardly due to the adjusted position of jack 125.

To obtain crushed rock particles of the same size the adjustment is the same for both fixed wedges 74, 75 so as to make gaps 135 at each side of the jaw crusher equal. However the position of the jaw members 74, 75 may be so adjusted as to make one lower discharge gap of a width different from the other lower discharge gap so that the machine can break up rock into two different sizes. The discharged broken up rock may fall onto suitable chutes (not shown) for carrying the rock to a gathering or receiving station.

With the pulleys connected by a belt drive to a source of power, rotation of the eccentric stub shafts 37, 38 will impart on rotation of main shaft 34 an oscillating swinging movement of jaw crusher 24 about the axis of its top shaft 52 which is yieldably vertically movable, thus giving the jaw crusher 24 a slight up and down movement. Rock delivered into upper gaps 136 will move down and be broken up between the movable jaw crusher and its opposite fixed jaw members to be discharged into smaller broken up particles through lower gaps 135. Both the jaw crusher 24 and the fixed jaw members 74, 75 are made of a high-strength wear-resistant steel, as also the heads 93 of tie bolts 92.

While certain novel features of my invention have been shown and described and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing from the spirit ofthe invention.

What l claim is:

l. A dual rock-crushing machine comprising:

a. a boxlike casing open at its top and bottom having;

1. parallel vertical longitudinal sidewalls, and 2. parallel vertical end sidewalls,

b. said sidewalls being rigidly connected together at their adjacent vertical end edges,

c. a vertical jaw crusher centrally positioned within said casing,

d. means mounting said jaw crusher on the longitudinal sidewalls for oscillatory movement in a direction towards the end sidewalls of the casing about an axis adjacent the upper end ofthe jaw crusher,

c. said jaw crusher being of wedge formation with like transverse inclined sides,

. a pair of vertical jaw members within the casing each in spaced opposed relation to an inclined side of the jaw crusher providing a pair of spaced narrow discharge gaps at the bottom of the casing and a pair of spaced wide entrance gaps at the top of the casing,

whereby large size rocks delivered into the spaced wide gaps at the top of the casing will be crushed and broken up between the jaw crusher and its opposed jaw members for discharge in smaller pieces through the spaced narrow gaps at the bottom of the casing, wherein:

g. the upper edge of each of the longitudinal sidewalls in the zone of the spaced wide gaps is fiat and provides a slide track,

. fixed means at each end of the top of each jaw member supporting the same in sliding engagement on said slide tracks,

. each jaw member presenting a vertical planar surface in opposed relation to the adjacent inclined surface of the jaw crusher, and

j. adjustable means between each jaw member and an adjacent end sidewall of the casing operative to move the jaw members toward the jaw crusher to a selected fixed position to reduce the space therebetween and the size of the spaced narrow gaps at the bottom of the casing,

whereby the jaw crusher will break up the rock into smaller sizes for discharge from said reduced narrow width gaps,

wherein said adjustable means for each jaw meniber comprises:

k. a first wedge member having a flat inner vertical face in abutting engagement with the inside face of a jaw member that is also fiat and vertical, and an outer inclined face,

1. key means projecting from the inner face of the jaw member,

m. a complemental recess in the inner vertical face of the first wedge member receiving said key means whereby to support and lock the first wedge member to said jaw member,

n. said first wedge member being narrow at its top and wide at its bottom,

o. a second wedge member movable vertical with respect to said first wedge member, and wide at its top and narrow at its bottom,

p. said second wedge member having an inclined side slidably abutting the inclined side of the first wedge member and a vertical fiat side in abutting engagement with the inside surface of its adjacent casing end sidewall, and

q. power extending means operative on the second wedge member to move the same downwardly so as to move the first wedge member and its connected associated jaw member longitudinally within the casing towards the jaw crusher to a preselected fixed position,

including:

r. a pair of horizontal vertically spaced and aligned tie rods extending through a jaw member, its associated first and second wedge members and through an adjacent casing end wall to project outwardly therefrom,

s. each said tie bolt having a head seated within a complemental recess in the face of the jaw member,

t. spaced vertically aligned elongated slots in the second wedge member through which the tie rods extend and permitting the vertical movement of the second wedge member, and

u. a compression coil spring on each projecting end of a tie rod,

1. one end of the coil spring bearing on the surface of the associated casing end sidewall,

2. a seating washer on the tie bolt seating the other end of the coil spring, and

3. a nut on the end of the tie bolt engaging the seating washer and adjustable to provide a selected compression of said coil spring.

. The rock-crushing machine of claim 1 including:

. a bearing lug having a horizontal flat upper bearing surface fixedly secured to the lower end of each longitudinal sidewall of the casing interiorly thereof and in transverse alignment,

. there being a pair of such bearing lugs for each first wedge member,

an elongated recess at the side of each first wedge member having an upper flat bearing surface and in transverse alignment,

d, said first wedge members being supported by said bearing lugs which extend into said recesses with the upper flat bearing surface of a recess seated in sliding engagement on the upper flat bearing surface ofits associated lug, and

e. said elongated recesses being of a length exceeding the width of the bearing lug to provide clearance for the sliding movement of the first wedge member thereon towards the jaw crusher on downward movement of the second wedge member.

3. The rock-crushing machine of claim 2, including:

. an inverted U-shaped yoke having 1. vertical side arms and 2. a crossbeam,

. said yoke straddling the upper wide end of the second wedge member,

. said crossbeam being in vertical spaced relation to said upper wide end of the second wedge member,

d. said side arms engaging the outer surface of the casing longitudinal sidewalls,

e. means fixedly securing said side arms to said longitudinal sidewalls, and

a force applying unit fixedly positioned centrally between the crossbeam of each yoke and the wide end of the second wedge member opposite thereto operative when activated to force the second wedge member downwardly to effected selected adjustment of a jaw member.

4. The rock-crushing machine of claim 3, wherein:

. said force applying unit is a screwjack, and

. said crossbeam is reinforced by a rib structure extending longitudinally thereof. 

1. A dual rock-crushing machine comprising: a. a boxlike casing open at its top and bottom having;
 1. parallel vertical longitudinal sidewalls, and
 2. parallel vertical end sidewalls, b. said sidewalls being rigidly connected together at their adjacent vertical end edges, c. a vertical jaw crusher centrally positioned within said casing, d. means mounting said jaw crusher on the longitudinal sidewalls for oscillatory movement in a direction towards the end sidewalls of the casing about an axis adjacent the upper end of the jaw crusher, e. said jaw crusher being of wedge formation with like transverse inclined sides, f. a pair of vertical jaw members within the casing each in spaced opposed relation to an inclined side of the jaw crusher providing a pair of spaced narrow discharge gaps at the bottom of the casing and a pair of spaced wide entrance gaps at the top of the casing, whereby large size rocks delivered into the spaced wide gaps at the top of the casing will be crushed and broken up between the jaw crusher and its opposed jaw members for discharge in smaller pieces through the spaced narrow gaps at the bottom of the casing, wherein: g. the upper edge of each of the longitudinal sidewalls in the zone of the spaced wide gaps is flat and provides a slide track, h. fixed means at each end of the top of each jaw member supporting the same in sliding engagement on said slide tracks, i. each jaw member presenting a vertical planar surface in opposed relation to the adjacent inclined surface of the jaw crusher, and j. adjustable means between each jaw member and an adjacent end sidewall of the casing operative to move the jaw members toward the jaw crusher to a selected fixed position to reduce the space therebetween and the size of the spaced narrow gaps at the bottom of the casing, whereby the jaw crusher will break up the rock into smaller sizes for discharge from said reduced narrow width gaps, wherein said adjustable means for each jaw member comprises: k. a first wedge member having a flat inner vertical face in abutting engagement with the inside face of a jaw member that is also flat and vertical, and an outer inclined face, l. key means projecting from the inner face of the jaw member, m. a complemental recess in the inner vertical face of the first wedge member receiving said key means whereby to support and lock the first wedge member to said jaw member, n. said first wedge member being narrow at its top and wide at its bottom, o. a second wedge member movable vertical with respect to said first wedge member, and wide at its top and narrow at its bottom, p. said second wedge member having an inclined side slidably abutting the inclined side of the first wedge member and a vertical flat side in abutting engagement with the inside surface of its adjacent casing end sidewall, and q. power extending means operative on the second wedge member to move the same downwardly so as to move the first wedge member and its connected associated jaw member longitudinally within the casing towards the jaw crusher to a preselected fixed position, including: r. a pair of horizontal vertically spaced and aligned tie rods extending through a jaw member, its associated first and second wedge members and through an adjacent casing end wall to project outwardly therefrom, s. each said tie bolt having a head seated within a complemental recess in the face of the jaw member, t. spaced vertically aligned elongated slots in the second wedge member through which the tie rods extend and permitting the vertical movement of the second wedge member, and u. a compression coil spring on each projecting end of a tie rod,
 1. one end of the coil spring bearing on the surface of the associated casing end sidewall,
 2. a seating washer on the tie bolt seating the other end of the coil spring, and
 3. a nut on the end of the tie bolt engaging the seating washer and adjustable to provide a selected compression of said coil spring.
 2. a seating washer on the tie bolt seating the other end of the coil spring, and
 2. The rock-crushing machine of claim 1 including: a. a bearing lug having a horizontal flat upper bearing surface fixedly secured to the lower end of each longitudinal sidewall of the casing interiorly thereof and in transverse alignment, b. there being a pair of such bearing lugs for each first wedge member, c. an elongated recess at the side of each first wedge member having an upper flat bearing surface and in transverse alignment, d. said first wedge members being supported by said bearing lugs which extend into said recesses with the upper flat bearing surface of a recess seated in sliding engagement on the upper flat bearing surface of its associated lug, and e. said elongated recesses being of a length exceeding the width of the bearing lug to provide clearance for the sliding movement of the first wedge member thereon towards the jaw crusher on downward movement of the second wedge member.
 2. a crossbeam, b. said yoke straddling the upper wide end of the second wedge member, c. said crossbeam being in vertical spaced relation to said upper wide end of the second wedge member, d. said side arms engaging the outer surface of the casing longitudinal sidewalls, e. means fixedly securing said side arms to said longitudinal sidewalls, and f. a force applying unit fixedly positioned centrally between the crossbeam of each yoke and the wide end of the second wedge member opposite thereto operative when activated to force the second wedge member downwardly to effected selected adjustment of a jaw member.
 2. parallel vertical end sidewalls, b. said sidewalls being rigidly connected together at their adjacent vertical end edges, c. a vertical jaw crusher centrally positioned within said casing, d. means mounting said jaw crusher on the longitudinal sidewalls for oscillatory movement in a direction towards the end sidewalls of the casing about an axis adjacent the upper end of the jaw crusher, e. said jaw crusher being of wedge formation with like transverse inclined sides, f. a pair of vertical jaw members within the casing each in spaced opposed relation to an inclined side of the jaw crusher providing a pair of spaced narrow discharge gaps at the bottom of the casing and a pair of spaced wide entrance gaps at the top of the casing, whereby large size rocks delivered into the spaced wide gaps at the top of the casing will be crushed and broken up between the jaw crusher and its opposed jaw members for discharge in smaller pieces through the spaced narrow gaps at the bottom of the casing, wherein: g. the upper edge of each of the longitudinal sidewalls in the zone of the spaced wide gaps is flat and provides a slide track, h. fixed means at each end of the top of each jaw member supporting the same in sliding engagement on said slide tracks, i. each jaw member presenting a vertical planar surface in opposed relation to the adjacent inclined surface of the jaw crusher, and j. adjustable means between each jaw member and an adjacent end sidewall of the casing operative to move the jaw members toward the jaw crusher to a selected fixed position to reduce the space therebetween and the size of the spaced narrow gaps at the bottom of the casing, whereby the jaw crusher will break up the rock into smaller sizes for discharge from said reduced narrow width gaps, wherein said adjustable means for each jaw member comprises: k. a first wedge member having a flat inner vertical face in abutting engagement with the inside face of a jaw member that is also flat and vertical, and an outer inclined face, l. key means projecting from the inner face of the jaw member, m. a complemental recess in the inner vertical face of the first wedge member receiving said key means whereby to support and lock the first wedge member to said jaw member, n. said first wedge member being narrow at its top and wide at its bottom, o. a second wedge member movable vertical with respect to said first wedge member, and wide at its top and narrow at its bottom, p. said second wedge member having an inclined side slidably abutting the inclined side of the first wedge member and a vertical flat side in abutting engagement with the inside surface of its adjacent casing end sidewall, and q. power extending means operative on the second wedge member to move the same downwardly so as to move the first wedge member and its connected associated jaw member longitudinally within the casing towards the jaw crusher to a preselected fixed position, including: r. a pair of horizontal vertically spaced and aligned tie rods extending through a jaw member, its associated first and second wedge members and through an adjacent casing end wall to project outwardly therefrom, s. each said tie bolt having a head seated within a complemental recess in the face of the jaw member, t. spaced vertically aligned elongated slots in the second wedge member through which the tie rods extend and permitting the vertical movement of the second wedge member, and u. a compression coil spring on each projecting end of a tie rod,
 3. The rock-crushing machine of claim 2, including: a. an inverted U-shaped yoke having
 3. a nut on the end of the tie bolt engaging the seating washer and adjustable to provide a selected compression of said coil spring.
 4. The rock-crushing machine of claim 3, wherein: a. said force applying unit is a screwjack, and b. said crossbeam is reinforced by a rib structure extending longitudinally thereof. 